50.54% is the change from 558 to 840
Calculation steps:
[( 840 - 558 ) ÷ 558] x 100 = 50.54%
Formula
Percentage change = [(840 - 558) / 558] x 100
Subtract the new number by the original number
840 - 558 = 282
282 ÷ 558 = 0.5053763440860215
0.5053763440860215 x 100 = 50.54%